Sign 'n' Post vs Formstack
Formstack bills per merge and charges extra for API.
Formstack has no free tier at all — just a 14-day trial. API access is gated to the $99/mo Pro plan. Sign 'n' Post starts at $10/mo (Plus) with API on every plan, including free.
Side-by-side pricing
| Sign 'n' Post | Formstack | |
|---|---|---|
| Free tier | ✓ 100 requests/mo, 5 signing | ✕ 14-day trial only |
| Starter plan | $10/mo Plus: 50 signing requests, API | $59/mo Starter (no signing, no API) |
| Pro plan | $25/mo Unlimited signing, full API | $99/mo Pro (API access) |
| API access | ✓ Included on all plans | ✕ Enterprise only |
| Overages | ✓ $0.02/fill request overage (Pro) | ✕ $0.10/merge overage |
| Speed | ✓ PDFs in milliseconds | ✕ 100–300 merges/min cap |
| Signing | ✓ 50/mo on Plus, unlimited on Pro | ✕ Requires Suite ($250/mo) |
Formstack's pricing model
$0.10 per merge overage
Go over your Formstack merge limit and each extra merge costs $0.10. Sign 'n' Post overage is $0.02 per request — 5x cheaper.
API gated to $99/mo Pro plan
Formstack's API requires the Pro plan at $99/mo minimum. There's no free tier — just a 14-day trial that expires. Sign 'n' Post includes API access on every plan, including the free tier and $10/mo Plus.
100–300 merges/min ceiling
Formstack's cloud pipeline tops out at a few hundred merges per minute. Sign 'n' Post processes requests individually with no queue.
$59/mo doesn't include signing
Formstack requires Suite at $250/mo for signing. There's no ongoing free tier — just a 14-day trial. Sign 'n' Post includes signing from $10/mo (Plus) and unlimited signing from $25/mo (Pro).